Figure 1. Summary incidences of patients diagnosed with HCC between 1983 and 2012 at the original nine SEER sites.

Incidence a. and number b. of HCC cases are shown by age group (total and ages 0–39, 40–54, 55–69 and 70+ years) and calendar period. Incidence c, e, g. and number d, f, h. of HCC cases are grouped by sex, SES, and race, respectively.